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Adding objects from client side

Marko Ilic

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06/30/2024

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06/30/2024 - 23:41

Dear OPC Foundation,

I’m starting to work with OPC UA Servers/Clients and I have one question.

Is it possible to add new Objects/Nodes from Client side when server is up and running or I need to create them when creating server?

I’m programming in Python.

I’m asking because I don’t want to lose data. If I need to turn off server when I’m adding new nodes/objects all devices that want to reach OPC UA Server they will not be able to reach it for some time.

What do you propose to do, what do you think the best solution is?

Thanks for the answer and regards

Randy Armstrong

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05/30/2017

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07/02/2024 - 15:15

Depends on the server.

A lot of servers have a fixed address space that can only be changed by changing the configuration a server reads when it starts.

Other servers are completely dynamic and include methods that allow clients to create some new Nodes.

There are variations such as the WoT specification which allows a client to create nodes by uploading a WoT TD file.

In short, it is not clear why you think your client needs a generic ability to create nodes on the server.

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